This video even shows the gas escaping through the front of the barrel. Incredible! Has a working bolt, bolt catcher, and charging handle with the same mechanics as the real M4!! I may have to come back from my retirement of airsoft... lol... But, then again i'd rather reload ammo

After reviewing more videos and pictures of the M4 Gas blowback, I think that the lower receiver on the gun is a real AR-15 lower. Possibly with crappier aluminum of course, but it just might be something similar to the 80% lowers out there (no trades of course). Interesting...